FUEL SYSTEM 5-13
INSPECTION
Check the following items for any damage or clogging. If any
damages are found, replace the damaged parts with new ones.
* Pilot jet * Valve seat
* Main jet * Piston valve
* PiIot air jet * Starter jet
* Needle jet air bleeding hole * O-ring
* Float * Throttle valve
* Needle valve * Diaphragm
* Jet needle * Pilot outlet and by-pass ports
NEEDLE VALVE INSPECTION
If foreign matter is caught between the valve seat and the nee-
dle valve, the gasoline will continue flowing and overflow. If the
valve seat and needle valve are worn beyond the permissible
limits, similar trouble will occur. Conversely, if the needle valve
sticks, the gasoline will not flow into the float chamber. Clean the
float chamber and float parts with gasoline. If the needle valve is
worn as shown, replace and the valve seat with a new one.
Clean the fuel passage of the mixing chamber using com-
pressed air.
FLOAT HEIGHT ADJUSTMENT
To check the float height, turn the carburetor upside down.
Measure the float height A while the float arm is just contacting
the needle valve using venier calipers.
Bend the tongue as necessary to bring the float height A to the
specified level.
09900-20101: Venier calipers
Float height A: 17.1 ± 0.5 mm (0.67 ± 0.02 in)
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